AquaLock 3540-10 CTS Union Check Valve Push-to-Connect Fitting

The AquaLock 3540-10 is a CTS (Copper Tube Size) Union Check Valve designed for use in residential and commercial plumbing systems. This union-style check valve allows for easy inline installation and removal while preventing backflow and ensuring one-directional water flow through the line.

Key Features:

• Union design for easy installation, maintenance, and serviceability without cutting the line
• Check valve function prevents reverse flow and protects pumps, fixtures, and water treatment equipment
• CTS (Copper Tube Size) compatible — fits standard copper, CPVC, and PEX tubing
• Durable construction suitable for potable water applications
• Compact, inline form factor for tight installations

The union configuration makes this check valve especially practical for systems that require periodic servicing, as the valve body can be disassembled without disturbing surrounding pipe connections. It is well-suited for use in water filtration systems, reverse osmosis setups, pump discharge lines, and general plumbing installations where backflow prevention is required.